Safety systems
Problem | Possible causes/consequences and •► Solutions |
(USA only)
(Canada only)
The red brake system
warning lamp comes on
while the engine is
running. A warning tone
also sounds.
Risk of accident
The brake boosting effect is malfunctioning and the braking
characteristics may be affected.
•► Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.
•► Engage the parking brake.
•► Consult a qualified specialist workshop.
•► Observe the additional display messages in the multifunction display.
(USA only)
(Canada only)
The red brake system
warning lamp comes on
while the engine is
running. A warning tone
also sounds.
Risk of accident
There is not enough brake fluid in the brake fluid reservoir.
•► Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.
•► Engage the parking brake.
•► Consult a qualified specialist workshop immediately.
•► Observe the additional display messages in the multifunction display.
Do not add brake fluid. This will not rectify the malfunction.
WARNING
Driving with the brake warning lamp illuminated can result in an accident. Have
your brake system
checked immediately if the brake warning lamp stays on. Do not add brake fluid
before checking
the brake system.
Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be seriously burned.
Problem | Possible causes/consequences and •► Solutions |
The yellow ABS warning lamp is lit while the engine is running.
Risk of accident
ABS (Anti-lock Brake System) is deactivated due to a malfunction.
ESP® (Electronic Stability Program), BAS (Brake Assist), BAS PLUS, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function and hill start assist are therefore also deactivated, for example.
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.
ATTENTION ASSIST is deactivated.
•► Observe the additional display messages in the multifunction display.
•► Drive on carefully.
•► Visit a qualified specialist workshop.
The yellow ABS warning lamp is lit while the engine is running. A warning tone also sounds.
Risk of accident
EBD (electronic brake force distribution), is malfunctioning.
Therefore, ABS, BAS, BAS PLUS, ESP®, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function and hill start assist are also unavailable, for example.
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.
•► Observe the additional display messages in the multifunction display.
•► Drive on carefully.
•► Visit a qualified specialist workshop.
(USA only)
(Canada only)
The red brake warning lamp, the yellow ESP® and ESP® OFF warning lamps and the yellow ABS warning lamp are lit while the engine is running.
Risk of accident
ABS and ESP® are faulty. Other systems, e.g. BAS, BAS PLUS, EBD,
PRE-SAFE®, PRE-SAFE® Brake, the HOLD function and hill start
assist, are also not available due to a malfunction.
The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.
ATTENTION ASSIST is deactivated.
•► Observe the additional display messages in the multifunction display.
•► Drive on carefully.
•► Visit a qualified specialist workshop.
The yellow ESP® warning lamp flashes while the vehicle is in motion.
Risk of accident
ESP® or traction control has intervened because there is a risk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
•► Only depress the accelerator pedal as far as necessary when pulling away.
•► Ease off the accelerator pedal while the vehicle is in motion.
•► Adapt your driving style to suit the road and weather conditions.
•► Do not deactivate ESP®.
Exceptions:
The yellow ESP® OFF warning lamp is lit while the engine is running.
Risk of accident
ESP® is deactivated. ESP® will not stabilize the vehicle if it starts
to skid or if a wheel starts to spin.
•► Reactivate ESP®.
Exceptions:
•► Adapt your driving style to suit the road and weather conditions.
If ESP® cannot be activated:
•► Have ESP® checked at a qualified specialist workshop.
AMG vehicles only:
The yellow SPORT handling mode warning lamp is lit while the engine is running.
Risk of accident
SPORT handling mode is activated. ESP® only stabilizes the vehicle
in extreme situations. ESP® intervention may not be able to
provide sufficient assistance in such situations and the vehicle
may start to skid.
•► Reactivate ESP®.
Exceptions:
If ESP® cannot be activated:
•► Have ESP® checked at a qualified specialist workshop.
The yellow ESP® and ESP® OFF warning lamps are lit while the engine is running.
Risk of accident
ESP®, BAS, BAS PLUS, PRE-SAFE®, PRE-SAFE® Brake, the HOLD
function and hill start assist are not available due to a malfunction.
ESP® will not stabilize the vehicle if it starts to skid or if a wheel starts to spin.
The brake system continues to function normally, but without the functions listed above.
ATTENTION ASSIST is deactivated.
•► Observe the additional display messages in the multifunction display.
•► Drive on carefully.
•► Visit a qualified specialist workshop.
(USA only)
(Canada only)
The red brake system
warning lamp comes on
while the vehicle is
moving. A warning tone
also sounds.
You are driving with the parking brake applied.
•► Release the parking brake The warning lamp goes out and the warning tone ceases.
The red SRS warning lamp is lit while the engine is running.
Risk of injury
The restraint systems are malfunctioning. The air bags or ETDs
may either be triggered unintentionally or, in the event of an
accident, not be triggered at all.
•► Drive on carefully.
•► Visit a qualified specialist workshop immediately.
WARNING
In the event a malfunction of the SRS is indicated as outlined above, the SRS
may not be
operational.
For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Center immediately to have the system checked. Otherwise the SRS may not be activated when needed in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and unnecessarily which could also result in injury.
See also:
Daytime running lamps
Daytime running lamps in Canada
The daytime running lamps function is required by law in Canada. It cannot therefore
be deactivated.
Turn the light switch to
or . With the engine running: d ...
Transferring data to another system
(vehicle)
Insert/connect the storage medium (SD
card or USB stick) with the saved data into/
to the relevant interface.
Select Vehicle in the main function bar by
turning the COMAND controller and
p ...
Hill start assist
Hill start assist helps you when pulling away forwards or in reverse on an uphill
gradient. It holds the vehicle for a short time after you have removed your foot
from the brake pedal. This gives ...